User guide

Enfora GSM1308 and
GSM1318
Quad-Band Spider®
SA-G+
User Guide P a g e 7 Revision: 1.03
Figure 4 Molex Connector and Pins
2.2.1 GPIO1 (INPUT/OUTPUT)
2.2.1.1 GPIO 1 ELECTRICAL SPECIFICATIONS
• Input VIH: >2.2 V
• Input VIL: <1 V
• Output VOH: 3 V
• Output VOL: 0
• Max Source Current: Approximately 350 μA
• Max Sink Current: 3.7 mA @ 40 V, 0.13 W
2.2.1.2 GPIO1 AS AN INPUT
Set the bus direction to be “input” by using the “AT$IOGP1=1” command.
Verify that GPIO1 is set to be an input by using the “AT$IOCFG?” command.
2.2.1.3 GPIO1 AS AN OUTPUT
Change GPIO1 to be an output by using the “AT$IOCFG=xxx” command.
Set the bus direction to be an output by using the “AT$IOGP1=0” command.